47RE Planetary 2001, used and ready to install. Fits the 47RE. Ships fast from the USA.
Opened up the 47RE in a Ram 2500 or 3500 Cummins and found the rear gearset with heat-blued pinions, a chipped ring gear, or needle rollers on the magnet? This listing is a used Mopar rear planetary carrier sold together with its rear ring gear (annulus). The carrier has four pinions. The listing calls out a 2001 Ram Cummins, and the description notes this particular set came out of a 1996 Ram 2500 quad cab diesel automatic, so the honest fitment window is the 1996-2002 range it is listed for, not one model year. The photos show the actual parts you get.
The 47RE makes first, second and third with two simple planetary sets that share a single sun gear, then adds fourth through the overdrive unit at the back of the case. In the rear set, the ring gear is splined to the intermediate (output) shaft and the carrier is tied to the low-reverse drum. In first gear the overrunning clutch stops that drum from turning, so the rear carrier becomes the reaction member and the whole torque multiplication of first runs through these four pinions. In manual low and in Reverse the rear band clamps the same drum and the set does the same job. Behind a 5.9L Cummins that is a lot of load on a small carrier, which is why the rear set is the one that shows wear first on trucks that pull a trailer off the line all day. In second, third and fourth it rides along without carrying reaction torque.
Noise and slip in first and Reverse have cheaper causes, so check them before you pull the transmission. Low or burnt ATF+4, a restricted cooler and a rear band out of adjustment all give similar complaints; our 47RE common problems and fixes guide walks through those checks, and the Ram 3500 Cummins problems guide covers the towing-related failures. If the noise is there in Park and follows engine rpm, it is the pump, not the gear train. The rear set can only really be judged on the bench: spin each pinion, feel for rock on the shafts, and look closely at the ring gear teeth.
Listed for 47RE (A618) automatics in 1996-2002 Dodge Ram 2500 and 3500 trucks with the 5.9L Cummins, 12-valve and 24-valve. This set was removed from a 1996 diesel unit. Spline and thrust washer details changed over the RE years, so lay your old carrier and ring gear next to the photos and compare spline count, pinion count and the ring gear hub before installing, or send us your year and VIN and we will check it for you. It is not listed for the 48RE. Every other hard part we carry for this unit is on our 47RE parts page.
The sun gear rides between the two sets, so inspect it while you are in there; we also stock the 47RE sun gear driving shell and the 47RE front ring gear. Fresh frictions from the 47RE master rebuild kit are worth adding when the unit is already apart.
| Fits | 47RE 2001 |
| Part type | Planetary |
| Condition | Used |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Rear. It is the four-pinion rear planetary carrier with the rear ring gear (annulus) that splines to the intermediate shaft. The front set is a separate carrier and ring gear.
It is listed for 1996-2002 47RE trucks and came out of a 1996 diesel unit. Compare spline and pinion count with your old parts or send us your year and VIN and we will confirm before it ships.
It is not listed for the 48RE. Match it to your parts before using it in anything other than a 1996-2002 47RE.
ATF+4. Check the level hot in Neutral and confirm cooler flow, since a restricted cooler is a common reason these gears burn.
New snap rings, any cracked or worn tabbed thrust washers and thrust plates, and inspect the sun gear bushings, low-reverse drum and overrunning clutch. Most people do frictions and seals at the same time.
Usually a whine or growl in first and Reverse that fades after the 1-2 shift, since the rear set only carries reaction torque in those ranges.
